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F. SARGENT AND'H. c. HEAToN.'

WATER UJBE Bones. APPLICATION man APR. i4,A m5...

i 1,3 l 1,467. Patented July 29, 1919.

5* SHEETS-SHEET l.

. NVENTOR. WITNESSES.- W

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BY ATTORNEYS.

F. SARGENT AND H. C. HEATON.

WATER TuposLER. APPLICATION FILED APR.14.|916. 1,81 1,45?, )ntented July 29, 1919.

5 SHEETS-SHEET 2.

jpk/Lb; A TTORNE Ys.

F. SAHGENT AND H. C. HEATON.

WATER TUBE Benen.

APPLICATION FILED APR. 14| QI 1,31 LAG?. Patented July 2911919.

5 SHEETS-SHEET 3.

1N VEN TOR .S

. P L Cw f I ATTORNEYS.

F. SARGENT AND H. C.. HEATON.

WATER TUBE BOILER. APPLICATION FILED APR. I4. 19m.

1,3 l 1,467. Patented J Illy 29, 1919.

5 SHEETS-SHEET 4.

A TTORNE YS.

F. SARGENT AND H. C. HEATON.

WATER TUBE BOILER.

APPLICATION FILED APR. I4. Iglo.

1,31 1,7467. lzltwltvd July 29, 1919.

5 SHEETS-SHEET 5.

7;/ INVENTORY 0, Aal/JJM BY M M f/QUUQJQ ATTORNEYS.

FREDERICK SARGENT AND-HERMAN C. HEATON, 0F CHICAGO, ILLINOIS, ASSIGNOBSI" T0 TBIE BABCOCK & WILCOX COMIANY, OF BAYONNE, NEW JERSEY, A CORPORA- TION OF NEW JERSEY.

WATER-TUBE BOILER.

To all whbm it may concern.'

Be it known that we, FREDERICK SARGENT and HERMAN C. HEATON, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois,'have invented certain new and useful Improvementsin Water-Tube Boilers, of which the following is a speciicatlon.

Our invention relates to water tube boilers and will be understood by reference to the following description, taken in connection with the accompanying drawings, in which Figure 1 is av central longitudinal section of one, form of boiler embodying our invention, the drawing being more or diagrammatic; Fig. 2. a side View, partly in section, of another form; Fig-3 a sectlon -on the plane of the line 3 3 of Fig. 2; Fig.

,substantially uniform manner as the gases How through the boiler, the area for the passage of the gases on entering the boiler tubes, being considerably greater than that where they leave the boiler. Another object of the invention is to provide super-l heating surface and economizer surface, 1n

addition to the boiler surface, and to so arrange the boiler, superheating and econo- `I nizer surfaces that the hot gases will iow successively over the surfaces, and at the same time pass.l through ,areas which successively decrease from the front to the rear of the boiler. n

In the boiler shown in Fig. 1 the numeral 1 designates the front wall, 2 the rearwall, and 3 the roof of the setting. The boiler is shown as fired with an underfeed stoker 4, although any other means for firing may be employed. The rear wall 2 is inclined from the bridge wall 5 sev that the flow space for the gases, from the'combustion chamber 6, between the side walls, the rear .wall-2 and the roof 3, gradually decreases to the uptake v7 Extending from-side Ato side of the setting along the rear wall are aseries of headers connected by banks cf inclined tubes wlth Specification of Letters Patent.

Patented July 29, 1919.

Application filed April 14, 1916. Serial No. 91,003.

similar headers arranged vimmediately be-v low the roof 3. The inclination of the rear wall 2 necessarily requires that the tubes connecting these two series of headersl shall gradually decrease in length from the combustion chamber to the uptake. In the arrangement shown, the headers and tubes are connected in groups as follows z-The live headers 9 and l510 are connected by generating tubes 11; the three headers 12 and 13 are connected by superheater tubes 14; the seven headers' 15 and 16 are connected by generating tubes 17; and the headers 18 and 19 are connected'by economizer tubes 20. The hot gases from the furnace thus flow over the boiler tubes 11, then over superheater tubes 14, then over boiler tubes 17, and finally over the economizer tubes 20 to the uptake 7 The feed watei` enters the economizersec-r tion of the boiler, preferably through the rearmost of the. lower headers 18. If the lower economizer headers 18 are nippled together, and the upper headers 19 are similarly connected, then the water will be distributed through all the headers 18 and 'will iow upward through all ofthe economizer tubes to the up er headers 19. I-nsteadof nippling the eaders together, the iiow ofthe water may be downward through the rearmost section of economizer tubes to the last lower header 19, thence upward through the next section of tubes, downward through the third section, and so on to the last section ofi-tubes 20 to the vheader 19', which latter header is connected to two steam and water drums 21, one at each side of the boiler. Only one of said drums is indicated in' Fig. 1. Inl this case the water is delivered through the inlet pipe 192 to the uppermost of the cross boxes 19.

If the How of the water Vis u one section and down the next, so as to through each of the economizer sections, the counter-How principle will be established and the entering .or coldest water will be brought into contact with the coldest gases,

the purpose being toA more. nearly,l equalize` the temperature through the"- economizer to prevent sweating, that is, the depqition of moisture on the outside of the economizer tubes. y

The two -sets of headers 9 and `15, to which the lower` ends of lthe generating tubes are connected, are-nippled to two drums 22, one

" ernten. y,

ow in series at each side of the boiler 'as shown in Fig. 5. These drums are supplied with water from the steam and water drum 21 through the curved pipes 23, 24 and 25, extending along each side of the lboiler. The upper sets of headers 10 andv 16 are connected to the steam and water drums 21. The steam generated in the tubes 11 and 17 passes from the headers 10 and 16 to the steam and water drums, and thence through connections, one of which is shown at 26, into a cross-box 27 and headers 1 3 atV the upermost ends of the superh-eater tubes 14. The steam passes down through the superheater tubes 14 to the headers 12 and is collected at each side of the boiler in boxes, one of which is shown inl dotted lines at 28. From these boxes the steam passes to the steam mains.

At the front of the combustion chamber is a'bank of tubes 29 connected to lower and upper headers 30 and 31, respectively, these tubes preventing the front wall 1 from bc-.

coming overheated. They also form a highly effective surface for the absorption of the radiant heat from the furnace and thereby add to the boiler capacity. The water for the tubes 29 is supplied from the headers 30 which are connected at each end with drums 32. The latter are connected by the curved tubes 33 with the water spaces of the steam and water drums 21.

As shown in Fig. y1 some of the nippled connections which lead fromthe ends of the horizontal headers are cross-sectioned and others are not so marked. Those connections which are cross-sectioned are connected directly into the steam and water drums, or the water drums, at the sides of the boiler, as above described. Those connections of the economizer headers which are not sectional indicate either hand-hole fittings, which can I'be opened-up for washing out the headers, or openings which vmay be used for attaching drums or collector boxes at the side of the boiler. These drums or collector boxes if attached to the 'economizer would serve as a means for distributing the How of water between the headers either in whole or in part.

I n Figs. 2', "3 and 4 we have shown our invention as applied to a boiler of the A- shaped type `having a centrally disposed Combustion chamber with lfiring openings at both the front and rear of the setting, and with. the boiler tubes, economizer and superheatlng banks of tubes, arranged on both sides of the combustion chamber. In Fig.

2 we have indicated both of the steam and water drums 21, and the connections from said drums to the lower drums 22 to which the banks of generating tubes 11 and 17 are connected. The feed water enters through the pipe 34 to the economizer tubes 20'and ows therefrom through headers 19 to the steam and water drums 21. From these latyLetters Patent of the 1. A water tube boiler having a .bank of substantlally parallel tubes arranged in ter drums the water is distributed through the curved'tubes 23, 24 and 25 to the lower drums 22, and from the latter to the two banks of generating tubes. The steam from the steam and water drum flow-s through the pipes 35 to a box 36, to which two of the rows of superheater tubes 12 are connected.

The steam flows down these two rows of tubes to the lower box 37, and thence upward through the remaining rows of superheater tubes 12 to box 38, and thence to the steam main 39. The righthand side of the boiler will be arranged as-is the left hand side.

`In Fig. 3l we have indicated a connection 40 for the air blast for an induced draft system,

As shown in Figs. 1 .and 2 each of the headers 9 is connected to its upper header 10A by a singlerow' of tubes, while the reflow of the gases after they pass the generating tubes 11, and this, together with a reduction in area at successive banks of tubes, due to the inclination of the rear wall, results in less reduction in the velocity of the gases as their temperature decreases, than would occur with a gas passage of uniform maining headers have connected to them two yrows of tubes. `The effect of this is to decrease the area between the tubes for the of the gases, will be less than with narrower 1s gaces, and the tubes will have a longer '1 e.

,Instead of decreasing the How space for the gases by inclining one of the walls of the setting toward the other, and decreasing the lengths of the tubes, as above described, 1t 1s obvious that the iow space may be decreased in other ways, as by a closer spacing of the tubes from the furnace to the uptake.

What we claim and desire to secure by United States isrows, the length of the tubes of a given row belng the same and the lengths`of the tubes of successive rows from the furnace toward Vleo 'to steam generating tubes, said drums being also connected to certain of the economizer and super-heater headers, a furnace discharging between the longer tubes, and a setting which, with the above arrangement of tubes, causes the gases to flow in one direction through decreasing iiow areas.

2. A water tube boiler having a bank of substantially parallel tubes arranged in rows, the length of the tubes of a given row being the same and the lengths of the tubes of successive rows from the furnace toward the gas outlet decreasing, the tubes nearest the furnace being generating tubes and said tubes succeeded by superheater tubes, generating tubes and economizer tubes, headers to which the ends of the tubes are connected, drums connected to the headers which in turn are connected to steam generating tubes, said drums being also connected to certain of the economizer and superheater headers, a furnace discharging between the longeil tubes, and a setting, which, with the above arrangement of tubes, causes the gases to flow in one direction through decreasing flow areas.

3. A water tube boiler having a bank of substantially parallel tubes arranged in rows, the length of the tubes of a given row being the same andthe lengths of the tubes of successive rows from the furnace toward the gas outlet decreasing, the tubes nearest the furnace being generating tubes and said tubes succeeded by superheater tubes and economizer tubes, headers to which the generating tubes are connected, drums connected to said headers, upper and lower headers to which the superheater tubes are connected, a cross box to which said upper headers areconnected and pipes connecting the same with said drums, a steam outlet connection from said lower headers, a furnace discharging between the longer tubes, and a setting which, with the above arrangement of tubes, causes the gases to fiow in one direction through decreasing flow areas.

4. A water tube boiler having a bank of substantially parallel tubes arranged in rows, the length of the tubes of a given row being the same and the lengths of the tubes of successive rows from the furnace toward the gas outlet decreasing, the tubes nearest the furnace being generating tubes and said tubes succeeded by superheater tubes and economizer tubes, headers to which the ends of the tubes are connected, drums connected to at least a part of said headers, a furnace discharging between the longer tubes, and asetting which, with the above arrangement of tubes, causes the gases to flow in one direction through decreasingflow areas, a bank of substantially vertical tubes in proximity to the front wall of the setting, and connections between said last-named bank of tubes and said drums.

I'n testimony whereof we have hereunto signed our names in the presence of two subscribing witnesses.

Witnesses:

R. J. STRAssER, M. J. EICHHORN. 

